I have noticed, when I like a girl, if I am sitting really close to her, I can feel her energy and it usually feels just like mine. It tells me that I probably would enjoy kissing etc with this person. Even if I don't actually get the chance to kiss them, I can get a good idea of whether it would feel right by the feel of their energy, and it often surprises me. It's like I'm usually in denial about how much I like them, I'm thinking "do I fancy her? No, surely not" but only when up close to them can I tell that I actually do. Does anyone else get this?
Ha no she is definitely not straight, but I have had this feeling with more than one girl, not just her but a couple of others too that I know. I guess that getting so close to someone gives you some of the insight that sex would give, as it's still intimate enough to be in their personal space.